Method of obtaining para-xylene

Details Method of obtaining para-xylene Method of obtaining para-xylene

2007-09-18

2007-09-18

Dang, Thuan Dinh (Department: 1764)

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

By isomerization

C585S477000, C585S820000, C585S828000

Reexamination Certificate

active

10427515

ABSTRACT:
Disclosed herein is an improved method for making and obtaining para-xylene from a mixture of xylene isomers, and various embodiments of the method. The method generally includes contacting a mixture comprising xylene isomers and ethylbenzene with a para-xylene selective adsorbent to obtain a para-xylene depleted raffinate, and a desorption effluent comprising a para-xylene enriched product. The method also includes isomerizing the para-xylene depleted raffinate. The contacting step is carried out in a manner such that the raffinate need not be pressurized prior to isomerization, thus advantageously obviating expensive compression steps.

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